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<div class="subTitle">org.apache.commons.math3.ode.sampling</div>
<h2 title="Interface FieldFixedStepHandler" class="title">Interface FieldFixedStepHandler&lt;T extends <a href="../../../../../../org/apache/commons/math3/RealFieldElement.html" title="interface in org.apache.commons.math3">RealFieldElement</a>&lt;T&gt;&gt;</h2>
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<dl><dt><span class="strong">Type Parameters:</span></dt><dd><code>T</code> - the type of the field elements</dd></dl>
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<pre>public interface <span class="strong">FieldFixedStepHandler&lt;T extends <a href="../../../../../../org/apache/commons/math3/RealFieldElement.html" title="interface in org.apache.commons.math3">RealFieldElement</a>&lt;T&gt;&gt;</span></pre>
<div class="block">This interface represents a handler that should be called after
 each successful fixed step.

 <p>This interface should be implemented by anyone who is interested
 in getting the solution of an ordinary differential equation at
 fixed time steps. Objects implementing this interface should be
 wrapped within an instance of <a href="../../../../../../org/apache/commons/math3/ode/sampling/FieldStepNormalizer.html" title="class in org.apache.commons.math3.ode.sampling"><code>FieldStepNormalizer</code></a> that itself
 is used as the general <a href="../../../../../../org/apache/commons/math3/ode/sampling/FieldStepHandler.html" title="interface in org.apache.commons.math3.ode.sampling"><code>FieldStepHandler</code></a> by the integrator. The
 <a href="../../../../../../org/apache/commons/math3/ode/sampling/FieldStepNormalizer.html" title="class in org.apache.commons.math3.ode.sampling"><code>FieldStepNormalizer</code></a> object is called according to the integrator
 internal algorithms and it calls objects implementing this
 interface as necessary at fixed time steps.</p></div>
<dl><dt><span class="strong">Since:</span></dt>
  <dd>3.6</dd>
<dt><span class="strong">See Also:</span></dt><dd><a href="../../../../../../org/apache/commons/math3/ode/sampling/FieldStepHandler.html" title="interface in org.apache.commons.math3.ode.sampling"><code>FieldStepHandler</code></a>, 
<a href="../../../../../../org/apache/commons/math3/ode/sampling/FieldStepNormalizer.html" title="class in org.apache.commons.math3.ode.sampling"><code>FieldStepNormalizer</code></a>, 
<a href="../../../../../../org/apache/commons/math3/ode/sampling/FieldStepInterpolator.html" title="interface in org.apache.commons.math3.ode.sampling"><code>FieldStepInterpolator</code></a></dd></dl>
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<h3>Method Summary</h3>
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<caption><span>Methods</span><span class="tabEnd">&nbsp;</span></caption>
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<th class="colFirst" scope="col">Modifier and Type</th>
<th class="colLast" scope="col">Method and Description</th>
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<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><strong><a href="../../../../../../org/apache/commons/math3/ode/sampling/FieldFixedStepHandler.html#handleStep(org.apache.commons.math3.ode.FieldODEStateAndDerivative,%20boolean)">handleStep</a></strong>(<a href="../../../../../../org/apache/commons/math3/ode/FieldODEStateAndDerivative.html" title="class in org.apache.commons.math3.ode">FieldODEStateAndDerivative</a>&lt;<a href="../../../../../../org/apache/commons/math3/ode/sampling/FieldFixedStepHandler.html" title="type parameter in FieldFixedStepHandler">T</a>&gt;&nbsp;state,
          boolean&nbsp;isLast)</code>
<div class="block">Handle the last accepted step</div>
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<tr class="rowColor">
<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><strong><a href="../../../../../../org/apache/commons/math3/ode/sampling/FieldFixedStepHandler.html#init(org.apache.commons.math3.ode.FieldODEStateAndDerivative,%20T)">init</a></strong>(<a href="../../../../../../org/apache/commons/math3/ode/FieldODEStateAndDerivative.html" title="class in org.apache.commons.math3.ode">FieldODEStateAndDerivative</a>&lt;<a href="../../../../../../org/apache/commons/math3/ode/sampling/FieldFixedStepHandler.html" title="type parameter in FieldFixedStepHandler">T</a>&gt;&nbsp;initialState,
    <a href="../../../../../../org/apache/commons/math3/ode/sampling/FieldFixedStepHandler.html" title="type parameter in FieldFixedStepHandler">T</a>&nbsp;finalTime)</code>
<div class="block">Initialize step handler at the start of an ODE integration.</div>
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<a name="init(org.apache.commons.math3.ode.FieldODEStateAndDerivative,org.apache.commons.math3.RealFieldElement)">
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<h4>init</h4>
<pre>void&nbsp;init(<a href="../../../../../../org/apache/commons/math3/ode/FieldODEStateAndDerivative.html" title="class in org.apache.commons.math3.ode">FieldODEStateAndDerivative</a>&lt;<a href="../../../../../../org/apache/commons/math3/ode/sampling/FieldFixedStepHandler.html" title="type parameter in FieldFixedStepHandler">T</a>&gt;&nbsp;initialState,
        <a href="../../../../../../org/apache/commons/math3/ode/sampling/FieldFixedStepHandler.html" title="type parameter in FieldFixedStepHandler">T</a>&nbsp;finalTime)</pre>
<div class="block">Initialize step handler at the start of an ODE integration.
 <p>
 This method is called once at the start of the integration. It
 may be used by the step handler to initialize some internal data
 if needed.
 </p></div>
<dl><dt><span class="strong">Parameters:</span></dt><dd><code>initialState</code> - initial time, state vector and derivative</dd><dd><code>finalTime</code> - target time for the integration</dd></dl>
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<h4>handleStep</h4>
<pre>void&nbsp;handleStep(<a href="../../../../../../org/apache/commons/math3/ode/FieldODEStateAndDerivative.html" title="class in org.apache.commons.math3.ode">FieldODEStateAndDerivative</a>&lt;<a href="../../../../../../org/apache/commons/math3/ode/sampling/FieldFixedStepHandler.html" title="type parameter in FieldFixedStepHandler">T</a>&gt;&nbsp;state,
              boolean&nbsp;isLast)</pre>
<div class="block">Handle the last accepted step</div>
<dl><dt><span class="strong">Parameters:</span></dt><dd><code>state</code> - current value of the independent <i>time</i> variable,
 state vector and derivative
 For efficiency purposes, the <a href="../../../../../../org/apache/commons/math3/ode/sampling/FieldStepNormalizer.html" title="class in org.apache.commons.math3.ode.sampling"><code>FieldStepNormalizer</code></a> class reuses
 the same array on each call, so if
 the instance wants to keep it across all calls (for example to
 provide at the end of the integration a complete array of all
 steps), it should build a local copy store this copy.</dd><dd><code>isLast</code> - true if the step is the last one</dd></dl>
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